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3 years ago

Which graph is an example of direct variation?

Mathematics

2 answers:

zaharov [31]3 years ago

6 0

The second graph. The one where the line is at 0,0

Svet_ta [14]3 years ago

3 0

Answer:

negative 2 is the answer

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Solve open parentheses square root of 6 close parentheses to the 8 x power = 216x−3. (1 point)

Alchen [17]

x = −9

x = −3

x = 0

x = 4

6 0

3 years ago

Tyrone is twice as old as his daughter. In six years Tyrone's age will be

Shalnov [3]

Answer:

x + y = 7

x^2 + y^2 = 25

Step-by-step explanation:

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3 years ago

Which equation represents a line that passes through the two points in the

Ipatiy [6.2K]

(3,3) and (6,5)
find slope
5-3/6-3=2-3=m so the answer is either a or d

now for point slope (3,3) was used so the correct equation would be
y-3=2/3(x-3) which is a!!

4 0

3 years ago

how many weeks of data must be randomly sampled to estimate the mean weekly sales of a new line of athletic footwear? We want 98

Ber [7]

Answer:

We need to sample at least 37 weeks of data.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.98}{2} = 0.01$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.01 = 0.99$ , so $z = 2.327$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

We want 98% confidence that the sample mean is within $500 of the population mean, and the population standard deviation is known to be $1300

This is at least n weeks, in which n is found when $M = 500, \sigma = 1300$

$M = z*\frac{\sigma}{\sqrt{n}}$

$500 = 2.327*\frac{1300}{\sqrt{n}}$

$500\sqrt{n} = 2.327*1300$

$\sqrt{n} = \frac{2.327*1300}{500}$

$(\sqrt{n})^{2} = (\frac{2.327*1300}{500})^{2}$

$n = 36.6$

Rounding up

We need to sample at least 37 weeks of data.

8 0

3 years ago

The dimensions of Amy’s rectangular garden are 15 feet by 12 feet. Amy wants to buy flowers to improve the appearance of her gar

ser-zykov [4K]

Answer:

$50.40

Step-by-step explanation:

The garden has an area of ...

(15 ft)(12 ft) = 180 ft²

Amy wants to cover 1/4 of that with flowers, so the area devoted to flowers is ...

(1/4)(180 ft²) = 45 ft²

The cost for each square foot is $1.12, so the cost of the flowers will be ...

($1.12/ft²) × 45 ft² = $50.40 . . . . cost to cover 1/4 of the garden with flowers

4 0

3 years ago

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